Spray bottles are great when they're full, but when they run low you're left jiggling, priming, and tilting them at odd angles just to spray an ever-weaker sputter of cleaner. Money blog Careful Cents suggests rather than struggle with near-empty cleaning supplies or waste the last of the bottle, just start using a new bottle, then top off the new bottle with the old one when there's room.

It's simple and kind of obvious, but it's also something most of us probably don't do. If you know what products work for you and buy the same things every time, there's no harm in combining bottles. Don't mix chemicals if you're not sure they're identical, but as long as you're mixing like with like, it's no problem. Old cleaning supplies don't go bad for the most part, which is one reason they're a safe bet to buy at the dollar store, and if you're low on space to keep extra bottles around, you can always mount a tension rod in one of your cabinets.

Careful Cents has a few more suggestions for saving money on your spring cleaning, including some of the household substitutions for cleaning products we've covered before, and a few coupon codes. Follow the link for more tips.